RTree Class

RTree implementation inspired by description on Wikipedia http://en.wikipedia.org/wiki/R-tree

Inheritance Hierarchy

SystemObject
VelocityDbOptimizedPersistable
VelocityDBExtensions.SpatialRTree

Namespace: VelocityDBExtensions.Spatial
Assembly: VelocityDBExtensions (in VelocityDBExtensions.dll) Version: 8.2.1.0 (8.2.1)

Syntax

public class RTree : OptimizedPersistable

Public Class RTree
	Inherits OptimizedPersistable

public ref class RTree : public OptimizedPersistable

type RTree =  
    class
        inherit OptimizedPersistable
    end

The RTree type exposes the following members.

Constructors

	Name	Description
	RTree	RTree implementaion customized for optimal performance with VelocityDB. Follows outline as described in http://en.wikipedia.org/wiki/R-tree

Properties

	Name	Description
	Bounds	Gets the bounds of all the entries in the spatial index, or null if there are no entries.
	Count	Get the number of rectangles that are managed by the Rtree

Methods

	Name	Description
	Add	Start at the Root Node Select the child that needs the least enlargement in order to fit the new geometry. Repeat until at a leaf node. If leaf node has available space insert Else split the entry into two nodes Update parent nodes Update the entry that pointed to the node with a new minimum bounding rectangle Add a new entry for the second new node If there is no space in the parent node, split and repeat
	checkConsistency	Check the consistency of the tree.
	Contains	Finds all rectangles contained by the passed rectangle
	InitializeAfterRead	(Overrides OptimizedPersistableInitializeAfterRead(SessionBase).)
	Intersects	Finds all rectangles that intersect the passed rectangle.
	Nearest	Finds the nearest rectangles to the passed point. If multiple rectangles are equally near, they will all be returned.
	NearestN	Finds the N nearest rectangles to the passed point. If multiple rectangles are equally near, they will all (but total limited to N) be returned.
	Remove	Removes a rectangle from the Rtree

Fields

	Name	Description
	defaultMaxNodeEntries	default maximum number of reactangles in a leaf RTree node
	defaultMinNodeEntries	default minimum number of reactangles in a leaf RTree node

Extension Methods

	Name	Description
	ToStringDetails(SessionBase, Boolean)	Overloaded. Object details as a string (Defined by Utilities.)
	ToStringDetails(Schema, TypeVersion, Boolean)	Overloaded. Currently only used by Database Manager (Defined by Utilities.)